Questions

The principal quantum number is the property of an electron which determines the energy of electron and the distance of electron from the nucleus of an atom.

An orthodontist is the type of doctor that specializes in teeth and jaw alignment. When the teeth don't align properly, it can cause uneven wear in the teeth.

The jaw is a hinge joint. Strong muscles in the face open and close the jaw. Teeth are implanted in the jaw and serve to rip, tear and crush food in preparation for swallowing it.

Cells are the the basic structural unit of the body.

When someone clicks your ad, the actual amount you’re charged will be " The minimum needed to hold your ad position, under the maximum cost-per-click limit ".

OSHA's mission is to protect the safety and health of America's workers. When the employer receives an OSHA citation, it must be posted for 3 days or until the violation is fixed.

American Revolution started in 1775 and lasted till 1781.

A rotating column of air is called as a Tornado which extends from the thunderstorm to the ground.